From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757744AbcBIQIz (ORCPT ); Tue, 9 Feb 2016 11:08:55 -0500 Received: from terminus.zytor.com ([198.137.202.10]:38381 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757723AbcBIQIw (ORCPT ); Tue, 9 Feb 2016 11:08:52 -0500 Date: Tue, 9 Feb 2016 08:07:31 -0800 From: tip-bot for Andy Lutomirski Message-ID: Cc: toshi.kani@hp.com, luto@kernel.org, aryabinin@virtuozzo.com, hpa@zytor.com, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, luto@amacapital.net, bp@suse.de, peterz@infradead.org, dvlasenk@redhat.com, dave.hansen@linux.intel.com, akpm@linux-foundation.org, brgerst@gmail.com, mcgrof@suse.com, oleg@redhat.com, mingo@kernel.org, tglx@linutronix.de, bp@alien8.de Reply-To: mingo@kernel.org, tglx@linutronix.de, bp@alien8.de, oleg@redhat.com, brgerst@gmail.com, mcgrof@suse.com, dave.hansen@linux.intel.com, akpm@linux-foundation.org, dvlasenk@redhat.com, peterz@infradead.org, bp@suse.de, torvalds@linux-foundation.org, luto@amacapital.net, linux-kernel@vger.kernel.org, toshi.kani@hp.com, luto@kernel.org, aryabinin@virtuozzo.com, hpa@zytor.com In-Reply-To: <8a62b23ad686888cee01da134c91409e22064db9.1454096309.git.luto@kernel.org> References: <8a62b23ad686888cee01da134c91409e22064db9.1454096309.git.luto@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/mm] x86/mm: Add INVPCID helpers Git-Commit-ID: 060a402a1ddb551455ee410de2eadd3349f2801b X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 060a402a1ddb551455ee410de2eadd3349f2801b Gitweb: http://git.kernel.org/tip/060a402a1ddb551455ee410de2eadd3349f2801b Author: Andy Lutomirski AuthorDate: Fri, 29 Jan 2016 11:42:57 -0800 Committer: Ingo Molnar CommitDate: Tue, 9 Feb 2016 13:36:10 +0100 x86/mm: Add INVPCID helpers This adds helpers for each of the four currently-specified INVPCID modes. Signed-off-by: Andy Lutomirski Reviewed-by: Borislav Petkov Cc: Andrew Morton Cc: Andrey Ryabinin Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Luis R. Rodriguez Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Toshi Kani Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/8a62b23ad686888cee01da134c91409e22064db9.1454096309.git.luto@kernel.org Signed-off-by: Ingo Molnar --- arch/x86/include/asm/tlbflush.h | 48 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index 6df2029..8b57683 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -7,6 +7,54 @@ #include #include +static inline void __invpcid(unsigned long pcid, unsigned long addr, + unsigned long type) +{ + u64 desc[2] = { pcid, addr }; + + /* + * The memory clobber is because the whole point is to invalidate + * stale TLB entries and, especially if we're flushing global + * mappings, we don't want the compiler to reorder any subsequent + * memory accesses before the TLB flush. + * + * The hex opcode is invpcid (%ecx), %eax in 32-bit mode and + * invpcid (%rcx), %rax in long mode. + */ + asm volatile (".byte 0x66, 0x0f, 0x38, 0x82, 0x01" + : : "m" (desc), "a" (type), "c" (desc) : "memory"); +} + +#define INVPCID_TYPE_INDIV_ADDR 0 +#define INVPCID_TYPE_SINGLE_CTXT 1 +#define INVPCID_TYPE_ALL_INCL_GLOBAL 2 +#define INVPCID_TYPE_ALL_NON_GLOBAL 3 + +/* Flush all mappings for a given pcid and addr, not including globals. */ +static inline void invpcid_flush_one(unsigned long pcid, + unsigned long addr) +{ + __invpcid(pcid, addr, INVPCID_TYPE_INDIV_ADDR); +} + +/* Flush all mappings for a given PCID, not including globals. */ +static inline void invpcid_flush_single_context(unsigned long pcid) +{ + __invpcid(pcid, 0, INVPCID_TYPE_SINGLE_CTXT); +} + +/* Flush all mappings, including globals, for all PCIDs. */ +static inline void invpcid_flush_all(void) +{ + __invpcid(0, 0, INVPCID_TYPE_ALL_INCL_GLOBAL); +} + +/* Flush all mappings for all PCIDs except globals. */ +static inline void invpcid_flush_all_nonglobals(void) +{ + __invpcid(0, 0, INVPCID_TYPE_ALL_NON_GLOBAL); +} + #ifdef CONFIG_PARAVIRT #include #else